Regioselective synthesis of multisubstituted pyrazoles via cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines
2011
Jin, Weiwei | Yu, Haifeng | Yu, Zhengkun
Multisubstituted pyrazoles were efficiently synthesized by cyclocondensation of β-thioalkyl-α,β-unsaturated ketones with hydrazines under relatively mild conditions. A one-pot synthetic protocol through tandem Liebeskind–Srogl cross-coupling/cyclocondensation using α-oxo ketene dithioacetals as the starting materials was also realized for the same purpose.
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